Photograph of cotton bales being pulled along a wharf in Los Angeles Harbor, March 5, 1931. A tractor can be seen in the foreground at left, and it is towing a long line of cylindrical cotton bales behind it at center. The bales are sitting on four flat-bed trailers. In the background at right, a large cargo ship can be seen along the dock, while another freighter is visible in the background at left, across the water. Several workers and automobiles can be seen next to a warehouse in the background at right.